If confirmed, the rock would become just the second world past Neptune in our solar system to host an atmosphere.

The finding offers fresh insight into our solar system’s farthest, coldest objects in a region known as the Kuiper Belt.

Scientists are grappling with a cosmic mystery: why does the Universe behave differently on massive scales compared to our ...

Pluto was believed to be the only body beyond Neptune with an atmosphere. Now, a new discovery in our solar system is ...

The interstellar comet 3I/ATLAS was the third object ever discovered in our solar system that originated from another star system. Despite a viral conspiracy theory, NASA officials have repeatedly ...